.d-flex {
    display: flex;
}

.text-center {
    text-align: center;
}
.border{
    border-radius: 10px;
}

/* 水平垂直居中 */

.d-flexs {
    display: flex;
    align-items: center;
    justify-content: center;
}


/* justify 样式 */

.justify-center {
    justify-content: center;
}

.justify-space-between {
    justify-content: space-between;
}

.justify-space-around {
    justify-content: space-around;
}

.justify-space-evenly {
    justify-content: space-evenly;
}

.justify-end {
    justify-content: end;
}

.justify-start {
    justify-content: start;
}

.justify-flex-end {
    justify-content: flex-end;
}

.align-items-center {
    align-items: center;
}

.mt-1 {
    margin-top: 10px;
}

.mt-2 {
    margin-top: 20px;
}

.mt-3 {
    margin-top: 30px;
}

.mt-4 {
    margin-top: 40px;
}

.mt-5 {
    margin-top: 50px;
}

.mr-1 {
    margin-right: 10px;
}

.mr-2 {
    margin-right: 20px;
}

.mr-3 {
    margin-right: 30px;
}

.mr-4 {
    margin-right: 40px;
}

.mr-5 {
    margin-right: 50px;
}

.mb-1 {
    margin-bottom: 10px;
}

.mb-2 {
    margin-bottom: 20px;
}

.mb-3 {
    margin-bottom: 30px;
}

.mb-4 {
    margin-bottom: 40px;
}

.mb-5 {
    margin-bottom: 50px;
}

.ml-1 {
    margin-left: 10px;
}

.ml-2 {
    margin-left: 20px;
}

.ml-3 {
    margin-left: 30px;
}

.ml-4 {
    margin-left: 40px;
}

.ml-5 {
    margin-left: 50px;
}